WebVisualization has a built-in file select dialog that programmers can use to allow an operator to load a file. The FileOpenSave dialog returns strings containing the file name and the absolute path. These can then be used throughout the programmer's IEC program to reference a file that has been selected by the user. A common use case is to provide a reference to a CNC file.
The sample project included in this article contains a visualization that demonstrates the use of the FileOpenSave dialog. It also contains a POU called PLC_PRG that shows how to implement the required initialization and support code.
The sample project can be downloaded using the link below select the project that matches your version of Parker Automation Manager: